It's difficult to miss the buzz and excitement surrounding the Fifa World Cup. Football (or soccer, as they call it in North America) is the world's most popular sport and the World Cup is the most prestigious prize of them all. For the first time in the tournament's nearly 100-year history, it will be jointly hosted by three countries - Mexico, Canada and the United States. The opening match will be played in Mexico City on 11 June. And the final is in the US state of New Jersey on 19 July.